Created
March 28, 2018 10:22
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Format __DATE__ and __TIME__ to ISO 8601
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#include <stdio.h> | |
#define MONTH0 ( __DATE__ [2] == 'n' ? (__DATE__ [1] == 'a' ? '0' : '0') \ | |
: __DATE__ [2] == 'b' ? 2 \ | |
: __DATE__ [2] == 'r' ? (__DATE__ [0] == 'M' ? '0' : '0') \ | |
: __DATE__ [2] == 'y' ? '0' \ | |
: __DATE__ [2] == 'l' ? '0' \ | |
: __DATE__ [2] == 'g' ? '0' \ | |
: __DATE__ [2] == 'p' ? '0' \ | |
: __DATE__ [2] == 't' ? '1' \ | |
: __DATE__ [2] == 'v' ? '1' \ | |
: '1') | |
#define MONTH1 ( __DATE__ [2] == 'n' ? (__DATE__ [1] == 'a' ? '1' : '6') \ | |
: __DATE__ [2] == 'b' ? 2 \ | |
: __DATE__ [2] == 'r' ? (__DATE__ [0] == 'M' ? '3' : '4') \ | |
: __DATE__ [2] == 'y' ? '5' \ | |
: __DATE__ [2] == 'l' ? '7' \ | |
: __DATE__ [2] == 'g' ? '8' \ | |
: __DATE__ [2] == 'p' ? '9' \ | |
: __DATE__ [2] == 't' ? '0' \ | |
: __DATE__ [2] == 'v' ? '1' \ | |
: '2') | |
// ISO 8601 YYYY-MM-DDThh:mm:ss | |
#define ISO_8601_DATE (const char[]){ __DATE__[7], __DATE__[8], __DATE__[9], __DATE__[10], \ | |
'-', MONTH0, MONTH1, \ | |
'-', __DATE__[4], __DATE__[5], \ | |
'T', __TIME__[0], __TIME__[1], \ | |
':', __TIME__[3], __TIME__[4], \ | |
':', __TIME__[6], __TIME__[7], \ | |
'\0' } | |
void main(void) | |
{ | |
printf("__DATE__: %s\n", __DATE__); | |
printf("__TIME__: %s\n", __TIME__); | |
printf("__TIMESTAMP__: %s\n", __TIMESTAMP__); | |
printf("ISO_8601_DATE: %s\n", ISO_8601_DATE); | |
} |
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